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BIO 253 EXAM 1 LATEST UPDATE
remove extracellular space between them, occurring in a band around the entire circumference of the cell?
Correct Answer: C) Tight junction
cells and limit what can pass between them to small molecules and ions?
Correct Answer: A) Gap junctions
low concentration is known as:
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Correct Answer: B) Simple diffusion
time?
Correct Answer: C) Flux
one compartment and net loss for another, is called:
Correct Answer: B) Net flux
equal (net flux equals zero)?
Correct Answer: B) Diffusion equilibrium
7. Temperature, mass of the molecule, surface area, and the medium are all:
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Correct Answer: D) Factors that affect net flux
8. The equation J = PA(Co-Ci) is known as:
Correct Answer: C) Fick's Law of Diffusion
selectivity, and prevent larger molecules from entering or leaving?
Correct Answer: A) Ion channels
force to influence ion movement is the:
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Correct Answer: B) Membrane potential
the:
Correct Answer: A) Electrochemical gradient
12. Acting as a selective barrier to the passage of molecules is the:
Correct Answer: A) Universal function of membranes
adjacent cells, and anchoring cells to the extracellular matrix are all:
Correct Answer: B) Functions of plasma membranes
amphipathic, and cannot be extracted without disrupting the lipid bilayer?